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(No Model.) 2 Sheets-Sheet 1 J. J. SMITH & 0. A.. JANSON.

zmo CASTING MACHINE.

No. 375,211. I Patented Dec. 20, 1887.

77w faraduc? WIT SSES: 7 INVENTOR:

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(No Model.) 4 2 Sheets-Sheet 2. J. J. SMITH 8v 0. A. JANSON.

zmo CASTING MACHINE.

Patented Dec. 20, 1887.

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dflraz I v v v BY ATTORNEYS.

N. FEYERS f nch-Lithographer, Walhinglnn. D. C.

UNITED STATES PATENT OFFICE.

JOSEPH J. SMITH, OF JAMAICA, AND CHARLES A. JANSON, on NEW YORK, N. Y.

ZINC-CASTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 375,211, dated December 20, .1887.

Application filed July 2, 1887. Serial No. 243,270. (No model.)

To all whom/it may concern.-

Be it known that we, JosEPH J. SMITH, a citizen of the United States, residing at Jamaica, in the county of Queens and State of New York, and OHARLEs A. JANSON, a subject of the King of Sweden, residing in the city, county, and State of New York, have invented a new and Improved Zinc-Casting Machine, of which the following is a full, clear, and exact description.

The object of our invention is to provide a new and improved zinc-casting machine specially adapted for making zinc beds used for separating the iron magnetic fields of dynamo electro machines from the iron bed-plates.

The invention consists in the construction and arrangement of various parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of our improvement. Fig. 2 is a sectional side elevation of the same; Fig. 3 is a vertical cross-section of the same. Fig. 4. is a sectional plan view of the sameon the line a: x of Fig. 3. Fig. 5 is a plan View of the finished zinc casting. Fig. 6 is a sectional elevation of the same on the lines y y of Fig. 5, and Fig. 7 is a similar view of the same on the lines z z of Fig. 5.

On the two opposite standards, A A, of a suitablyconstructed supporting frame are formed, near the top, the slots B, in which are held the lower ends of an inverted-U-shaped frame, 0, forming bearings on its lower ends for the trunnions or pivots D, secured to two opposite sides of the flask E, which swings on the trunnions D.

The flask E is formed on the inside of its bottom E and its sides and ends E and E to the shape to be given to the outside of the zinc casting F, which is made by our improved machine, and is represented in Figs. 5, 6, and 7.

In the bottom E of the flask E are placed two sets of wedges, G, extending at each end to the outside of the flask E by passing through slots Ein the ends of the flask E. The sets of wedges G are intended to form the longitudinal grooves F in the bottom of the zinc casting F.

On top of the flask E is placed the open cover-frame H, provided with the inwardlyextending flanges H and the outwardly-projecting guide arms or lugs H fitting over the side arms of the U-shaped frame 0, on which the said covenframe H is adapted to slide.

The two end flanges, H, of the cover-frame Hare connected with each other in the middle by a rib, H curved on its bottom edge and extending below the under side of the coverframe H, intended to form the top edge of the longitudinal rib F of the zinc casting F.

The flanges H on the cover-frame H support the flanges I of the core I, intended to form, with the outside of its slightly-inclined sides and ends, the inside of the sides and ends of the casting F, and the bottom I of the core, in connection with the bottom E of the flask E, and the two sets of wedges G are to form the bottom of the zinc casting F. 7

On the bottom 1* of the core I are held the longitudinal ribs or projections I, intended to form the openings F in the bottom of the zinc casting F, and the said ribs or projections I rest, when the core is in place, in the flask on the top of the sets of wedges. In the middle of the core I extends the longitudinal partition or rib I having a recess, 1, on its under side and fitting over the rib H of the cover-frame H.

The core I is loosely connected in the middle of its partition I with the lower end of the screw-rod J, screwing in the connecting-bar of the U-shaped frame 0, and carrying on its upper end a hand-wheel, J, by which the said screw-rod J is turned and the core raised or lowered into place in the flask.

On top of the cover-frame H are pivoted the clamps K, which, when swung inwardly and when the core I is in place in the flask E, secure the core I to the cover-frame H, which can then be raised with the core I by turning the screw-rod J.

In the top of one end of the flask E is formed a groove, E leading to the pouring-receptacle L, fastened by suitable clamps, N, held on the covecframe H, to the outside of the latter and the flask E.

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The operation is as follows: In the drawings the Figs. 1, 2, and 3 illustrate the machine afterthe zine casting F is made and the core I and the cover-frame H are withdrawn. The flask E is then turned upside down on its trunnions D, so that the casting F drops out of the flask E, and the latter is returned to its former position. In order to make the second casting F, the operator turns the handwheel J, so that the core I and the coverframe H" move downwardly until both are seated on top of the flask E; The fluid zinc is now poured into the receptacle L and passes through the groove into the space formed between the core I, the cover-frame H, and the flask E, and the casting F is formed. \Vhen the fluid zine cools off, it begins to contract; and in order to facilitate the contraction we diminish the space formed by the set of wedges G by moving one wedge of each set of wedges with its broad end outwardly. At the same time we raise the core I and the cover-frame H slightly by turning the hand-wheel J, so that the screw-rod J moves upward, carrying along the said core I and cover-frame H, which is guided in the side arms of the U-shaped frame 0, and the core I is held in the frame H by, the clamps. The metal is now permitted to contract easily according to its respective density. Vhen the casting is finished, the core I and frame H are raised by the screw-rod J to enable the flask E to be turned upside down, as above described, for discharging the cast- 111 It will be seen that by our improved machine we are enabled to form castings very rapidly and at the same time permit an easy contraction of the metal.

It will further be seen that the core is held firmly in place in the flask and no pressure is required to force the fluid metal into the mold, thus producing castings of very superior character.

Having thus fully described our invention, we claim as new and desire to secure by Letters Patent- I. In a casting-machine, the combination, wit-h a supporting-frame and a flask supported therein, of a cover-frame having a transverse rib, a core having a recessed bottom, and means for raising and lowering the core, substantially as herein shown and described.

2. In a casting-machine, the combination, with a supporting-frame and the flask E, pivoted therein, of the frame H, )rovided with the rib H, the core I, provided with the ribs 1, the partition I, and recess 1, and the screw J, attached to the core, working in ascrewthreaded aperture of the U shaped frame, substantially as herein shown and described.

3. In a casting-machine, the combination, with a pivoted flask, of a cover-frame held on top of the said flask, a core supported by the said cover-frame and adapted to be fastened thereto, and means, substantially as described, for raising and lowering the said core and cover-frame, as set forth.

JOSEPH J. SMITH.

CHARLES A. JANSON. Vitnesses:

Z. TAYLOR,

N. E. RAWSON. 

